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#include <QtGui/QLabel>
#include <QtGui/QAction>
#include <QtGui/QHBoxLayout>
#include <QtGui/QTableView>
#include <QtGui/QScrollArea>
#include <QtGui/QHeaderView>
#include <QtGui/QPushButton>

#include "featurerecognitionpage.h"
#include "featurerecognitionmodel.h"
#include "recognizedtypedelegate.h"
#include "etalonmodel.h"
#include "etalonview.h"
#include "etalondelegate.h"
#include "image.h"
#include "imageview.h"
#include "backgroundtaskwatcher.h"

FeatureRecognitionPage::FeatureRecognitionPage(FeatureRecognitionModel &model, QWidget *parent) :
    QWizardPage(parent),
    _model(model)
{
    setTitle(tr("Feature recognition"));
    setSubTitle(tr("Feature recognition.")); // TODO

    createActions();

    RecognizedTypeDelegate *recognizedTypeDelegate = new RecognizedTypeDelegate(_model.etalonModel());
    EtalonDelegate *etalonDelegate = new EtalonDelegate;

    QTableView *featuresView = new QTableView;
    featuresView->setModel(&_model);    
    featuresView->setItemDelegateForColumn(FeatureRecognitionModel::ERecognizedType, recognizedTypeDelegate);
    // TODO featuresView->setItemDelegateForColumn(FeatureRecognitionModel::EEtalon, etalonDelegate);
    featuresView->horizontalHeader()->setResizeMode(QHeaderView::ResizeToContents);
    featuresView->verticalHeader()->setResizeMode(QHeaderView::ResizeToContents);
    featuresView->setIconSize(QSize(50, 50)); // TODO

    QPushButton *recognizeButton = new QPushButton;
    recognizeButton->setText(tr("Recognizes features"));
    recognizeButton->setToolTip(tr("Recognizes features"));
    QObject::connect(recognizeButton, SIGNAL(clicked()), this, SLOT(featureRecognition()));

    QVBoxLayout *featuresLayout = new QVBoxLayout;
    featuresLayout->addWidget(featuresView);
    featuresLayout->addWidget(recognizeButton);
    featuresLayout->setStretch(0, 1);    

    EtalonView *etalonView = new EtalonView;
    etalonView->setModel(&_model.etalonModel());

    QHBoxLayout *featureRecognitionLayout = new QHBoxLayout;
    featureRecognitionLayout->addLayout(featuresLayout);
    featureRecognitionLayout->addWidget(etalonView);
    featureRecognitionLayout->setStretch(0, 1);
    featureRecognitionLayout->setStretch(1, 1);

    QLabel *stepsLabel = new QLabel();
    stepsLabel->setText(tr("1. Feature recognition"));
    stepsLabel->setAlignment(Qt::AlignLeft | Qt::AlignTop);
    stepsLabel->setWordWrap(true);

    QHBoxLayout *layout = new QHBoxLayout;
    layout->addWidget(stepsLabel);
    layout->addLayout(featureRecognitionLayout);
    layout->setStretch(0, 1);
    layout->setStretch(1, 4);
    this->setLayout(layout);
}

void FeatureRecognitionPage::initializePage()
{

}

void FeatureRecognitionPage::TODO(ItemTable features)
{
    _model.setFeatures(features);
}

void FeatureRecognitionPage::featureRecognition()
{
    FeatureRecognitionTask *task = _model.recognizeFeatures();
    BackgroundTaskWatcher watcher(task, tr("Recognizing features"));
    watcher.exec();
}

void FeatureRecognitionPage::createActions()
{
    recognitionAct = new QAction(tr("&Recognition"), this);
    recognitionAct->setShortcuts(QKeySequence::Print);
    recognitionAct->setStatusTip(tr("Feature recognition"));
    QObject::connect(recognitionAct, SIGNAL(triggered()),
                     this, SLOT(featureRecognition()));

    aboutAct = new QAction(tr("&About"), this);
    aboutAct->setStatusTip(tr("Show the application's About box"));
    //TODO QObject::connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
}
